Colling means for compressors and pumps



A. 0. CARPENTER.

COOLING MEANS FOR COMPRESSORS AND PUMPS.

APPLICATION FILED MAR. 1920- Patented Feb. 15, 1921.

INVENTOH all ddw ww STATES PATENT OFFICE.

ALLAN 0. CARPENTER, CORNING, NEW YORK, ASSIGNOB 'IO INGEBISOIJIIBAND COMPANY, @lE JERSEY CITY, NEW JERSEY, A CORPORATIUN OF NEW JERSEY.

COOLING MEANS FOR COMPRESSOJRS AND PUMPS.

Specification of Letters Patent.

Patented Feb. 15-. r921.

i To all wlwm it may concern."

til

]Be it known that I, ALLAN O. CARPENTER, a citizen of-the United States, residin at Corning, in the county of Steuben and tate of New York, have invented a certain new and useful Improvement in CoolingMeans for Compressors and Pumps, of which the following is a specification.

This invention relates to air or gas compressors or vacuum pumps, and has to do particularly with means for cooling the cylinders and other parts thereof by the c1rculation of a cooling medium, preferably air.

It has been customary to overcome the ef-.

fects of increased temperatures roduced in the operation of compressors an pumps, for instance, by coolingthe cylinderst rough the utilization of water or other liquid circulating through a jacket surrounding the cylin-.

der. Some machines of this kind, such as small types of single acting Vacuum pumps, have been constructed so that they are cooled by atmospheric air, the water jacket being used for this purpose, and mother air cooled machines unsightly ribs have been formed on the cylinders. Such air cooling is entirely inadequate and for that reason cannot be used for large types of engines, and, indeed, it is quite inefiicient when used in small ones. The object of the present invention is to eliminate the unsatisfactory features of prior constructions and to efliciently and economically cool the cylinders of vacuum umps, compressors and similar apparatus by means of a thorough circulation of air around the cylinder and other parts of the machine, whereby air-cooling may be generally resorted to for machines of the types set forth, even in lar e sizes. I I

This object, as Wel as others which will later appear, is accomplished by the device a practical embodiment of which is described in the following specification and illustrated in the accompanylngi drawing, forming a part hereof, in whic Figure 1 represents a vertical sectional,

view through the center of a vacuum pump embodying the invention; and

Fig. 2, a sectional view on the line 2-2 of Fig. 1.

The vacuum pump comprises a cylinder A in which reciprocates a piston B actuated b a connecting rod C secured to a wrist pin trunnioned 1n the piston B. The connecting rod 0 is attached to a crank E secured to a shaft F whichis rotated in hearings Gr--G through a belt wheel or'pulley H connected with an outside source of power (not shown). Surrounding the cylinder A is an outer casmg T. The connecting rod, crank. bearings, and other parts constituting the operating means for the piston are inclosed T, which by the lower end d of this casin lower end has a diameter slight y greater than the upper portion I. An open 'acket or compartment L is thus provide surrounding the piston operatin means and extending upwardly between t e outer wall pf the cylinder A and inner walls of the casmg I as shown at K, whereby a continuous chamber K- -L is provided withinthe casmg enveloping the cylinder and the piston operating means. This continuous chamber is utilized to cool the cylinder and other parts in the manner presently to be described.

It will be seen that this chamber does not extend entirely around the cylinder (see Fig. 2) exceptat t e upper end where an annular chamber .P, forming a part of the main cooling chamber K is formed, this chamber P being provided "with a plurality of constantly open ports Q leading to atmosphere. In the i'ends of the crankcase Within the outer casing J are cast walls or ribs R the upper portions of which serve to support the shaft F and bearings Gr, these walls forming, in effect, an inclosing casing for the moving parts of the piston operating mechanism. Chambers 0-0 are thus provided between these walls R and the outer casing J communicating by means of ports S, with the chamber L, and hence, the chambers K and P. Diagonally oppositeconstantly open ports T-T in the casing J, one adjacent to each end of the shaft communic'ate with atmosphere. This construc- 7 tion serves to prevent the entrance of foreign matter into the crank case, as well as to facilitate the carrying out of the purpose of this invention. I 'x From the above it will be seen that a continuous chamber O-L-K-P, cor'nmunicat .ing with atmosphere at its lgperand lower rot above the ports S. The air entering the crank case through the ports '1 serves to cool this liquid.

The operation of the present apparatus will be clear from the above description. Thorough circulation of the air is efiected by the reciprocation of the-piston and move: ment of the crank parts, air being alternately drawn in and expelled through the ports Q by the pulsatory action taking place within the casing J, .so that the well understood breathing effect is obtained. It will thus be seen that a continuous uninterrupted flow of cool air around the cylinder and other parts will occur as long as the machine is in operation. A very thorough cooling of the parts results, which contributes materially to the all-around efficiency of the machine.

It is to be understood that the present showing and description disclose only one specific embodiment of the present invention and that other forms and modifications are included within the spirit and scope of the same, as expressed in the appended claims, the essence of the invention comprising the provision of a continuous common chamber around the cylinder and moving parts within the crank case for cooling purposes.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A vacuum pump or compressor, comprising a casing, a cylinder and crank case within said casing, a common cooling chamber between said casing and cylinder and between said casing and crank case, and means for maintaining circulation of a cooling medium through said chamber;

2. A vacuum pump or compressor comprising a casing, a cylinder and crank case within said'casing, a piston within said cylinder, operating means for said piston, a common coolin chamber between said casing and cylin er and between said casing and crank case, and means whereby the piston and its operating parts serve to maintain circulation .of a cooling medium. through said chamber.

3. A vacuum pump or compressor compr'i'sing'a casing, a cylinder and crank case within said caslng, a c'ommon cooling chamber between said casing and cylinder and betweensaid casing and crank case, and means for admittin a cooling medium to said chamber and ischarging it from said cham- .ber adjacent to said cylinder;

4. Avacuum. pump or compressor comprisinga casing, a cylinder and crank case within said casing, a piston within said cylinder, operating means for said piston, a common coolin chamber between said casing and cylin er and between said casing and crank case, and constantcliyopen ports for admitting a cooling me ium to said aaeaaee agencg of the piston and its operating means.

vacuum 01 compressor comprising a casing, a cylinder and. crank case within said casing, a common continuous coolin chamber extending from the surface of sai cylinder to said crank case, ports in said outer casing for admitting a cooling medium to said crank case and for discharging said cooling medium, and means for maintaining a continuous circulation of the cooling medium through said chamber.

6. A vacuum pump or compressor comprising an outer casing, a cylinder and crank case within said casing, a piston, operating means for said iston, a common continuous cooling cham er extending from the surface of saidcylinder to said crank case,

ports in said outer casing for admitting a cooling medium to and discharging said. cooling medium from said crank case and means whereby the piston and piston operating means serve to maintain a continuous circulation of the cooling medium through said chamber.

in said cylinder, operating means forsaid piston, a common cooling chamber within said casing surrounding the cylinder and the admission and expulsion of cooling medium iseifected by movementof the piston operating means. a

8. A vacuum pump or compressor com prising an outer casing, a cylinder, a piston 7. A vacuum pump or. compressor comprising an outer casing, a cylinder, a piston piston operating means, and means whereby v in said cylinder, operating means for said piston, a common cooling chamber. within said casing surrounding said cylinder and operating means, an annular chamber around said cylinderforming a part of the common coolin chamber and ports in, said casin for a itting a cooling medium tosai chamber and for discharging the cooling medium therefrom to maintain a continu-' ous circulation] of said cooling medium Y throu h said chamber.

9. vacuum pump or compressor comprising an outer casing, a cylinder, a piston in sai cylinder, operating means 'for said piston, a common cooling chamber-within 'said casing surrounding .said cylinder and operatlng means, an annular chamber around said cylinder forming a part ofthe common coolin chamber an ports in said casin for a mitting a cooling medium to sai I chamber and; for discharging the coolin medium therefrom, the moving'parts of sai structure constituting pulsatory. means for maintaining a continuous, circulation of said cooling medium through said chamber. In testimony whereof I have hereunto set my hand. 1

ALLAN O. CA.RPENTER. 

